private static MyServiceDescriptor GetServiceDescriptor(Type serviceType)
{
MyServiceDescriptor serviceDescriptor = null;
if (scopedServiceTypes == null)
{
scopedServiceTypes = new Dictionary <Type, MyServiceDescriptor>();
}
else if (scopedServiceTypes.TryGetValue(serviceType, out serviceDescriptor))
{
return(serviceDescriptor);
}
if (!serviceTypes.TryGetValue(serviceType, out serviceDescriptor))
{
serviceDescriptor = MyServiceDescriptor.Transient(serviceType);
}
else if (serviceDescriptor.Scope == MyServiceScope.Singleton)
{
var hasInstance = serviceDescriptor.Instance != null;
if (hasInstance)
{
return(serviceDescriptor);
}
serviceDescriptor.slim.EnterReadLock();
hasInstance = serviceDescriptor.Instance != null;
serviceDescriptor.slim.ExitReadLock();
if (hasInstance)
{
return(serviceDescriptor);
}
}
if (serviceDescriptor.Type.IsInterface)
{
throw new NotImplementedException();
}
var constructor = serviceDescriptor.Type
.GetConstructors(BindingFlags.Public | BindingFlags.Instance)
.FirstOrDefault();
var parameters = new ArrayList();
foreach (var parameter in constructor.GetParameters())
{
var descriptor = GetServiceDescriptor(parameter.ParameterType);
// 单例不能访问Scoped的实例
if (serviceDescriptor.Scope == MyServiceScope.Singleton)
{
if (descriptor.Scope == MyServiceScope.Scoped)
{
throw new Exception("Scoped");
}
}
parameters.Add(parameter.HasDefaultValue ? parameter.DefaultValue : descriptor.Instance);
}
var instance = Activator.CreateInstance(serviceDescriptor.Type, parameters.ToArray());
if (serviceDescriptor.Scope == MyServiceScope.Scoped)
{
scopedServiceTypes.Add(serviceType, serviceDescriptor = MyServiceDescriptor.Scoped(instance));
}
else if (serviceDescriptor.Scope == MyServiceScope.Singleton)
{
serviceDescriptor.slim.EnterWriteLock();
serviceDescriptor.Instance = instance;
serviceDescriptor.slim.ExitWriteLock();
}
else
{
serviceDescriptor = MyServiceDescriptor.Transient(instance);
}
return(serviceDescriptor);
}
public static void AddSingleton <T1, T2>(this IMyServiceCollection services) where T2 : T1
{
serviceTypes.Add(typeof(T1), MyServiceDescriptor.Singleton(typeof(T2)));
}
public static void AddSingleton <T1>(this IMyServiceCollection services)
{
serviceTypes.Add(typeof(T1), MyServiceDescriptor.Singleton(typeof(T1)));
}
public static void AddTransient <T1, T2>(this IMyServiceCollection services) where T2 : T1
{
serviceTypes.Add(typeof(T1), MyServiceDescriptor.Transient(typeof(T2)));
}
public static void AddTransient <T1>(this IMyServiceCollection services)
{
serviceTypes.Add(typeof(T1), MyServiceDescriptor.Transient(typeof(T1)));
}
static MyServiceExtension()
{
serviceTypes.Add(typeof(IMyServiceProvider), MyServiceDescriptor.Singleton(new MyServiceProvider()));
}
